Ashes from fast pyrolysis bio-oil production of difgerent waste - - PowerPoint PPT Presentation

Ashes from fast pyrolysis bio-oil production of difgerent waste streams may be suited as soil amendment

HERAKLION

7th International Conference on Sustainable Solid Waste Management, 28.06.2019

• M. Probst, M. Fernández-Delgado Juárez, M. Gómez-Brandón, V.

Turan, H. Insam

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The project

Replace fossil fuels by renewable, sustainable resources  Biomass Biomas s

Fast pyrolysis

Char FPBO Gas FPBO

3

The project

Utilisation of difgerent biomass types for residential heating Biomas s

Fast pyrolysis

Char FPBO Gas

Combustio n

Energy for residential heating

Char Gas

4

The project

What to do with the ash?

• Landfjlling
• Cement industry

Biomas s

Fast pyrolysis

Char FPBO Gas

Combustio n

Energy for residential heating

Combustio n

Energ y Ash Ash

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The project

Advantages:

• Bufgering of soil pH
• Nutrients: Carbon,

minerals, salts,…

Biomas s

Fast pyrolysis

Char FPBO Gas

Combustio n

Energy for residential heating Soil amendme nt

Combustio n

Energ y Ash

Recycling

Disadvantages:

• (Heavy) Metals
• Polycyclic

hydrocarbons

• …

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The project

• Characterise the ashes from difgerent biomass types
• Apply ashes to grassland soil
• Monitor soil properties and plant biomass

Tasks

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Ash properties

sh leachate, Picture: Marina Fernández-Delgado Juárez.

Characterisation

• pH
• (Heavy) Metal

content

• Electrical

conductivity

• Carbon content
• Phytotoxicity
• …

Wheat straw Forest residues Miscanthus sp. Bar k

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Ash properties

Hackschnitzel

• pH > 12
• Carbon content up to 18%dry mass
• Phosphor content up to over 340 mg kg-1

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Ash properties

Hackschnitzel

(Heavy) Metal contents Phytotoxicity

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Field trial

Hackschnitzel

ield experiment in Imst, T

• yrol. Picture: Marina Fernández-Delgado Juárez.

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Field trial

Ash addition:

• 500 kg ha-1 a-1 (BMLFU guidelines) in autumn

Fertilization

• Cattle manure in spring (180 kg N ha-1 a-1)

1.Control 2.Bark-FPBO-Ash 3.Miscanthus-FPBO- Ash 4.Forest residues

• FPBO-Ash

!!Ash from wheat straw contained too high amounts of mobilisable Cr and Ni. It was not

Sampling

Soil:

• Beginning and end of

the growth period Plant biomass:

• 3 cuttings during the

growth period

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Field trial

• pH
• Electrical

conductivity

• Nitrogen
• Carbon
• Phosphorous
• Plant biomass

 3 Cuttings

Microbiolog y

• Soil respiration
• Microbial

biomass

• Abundance of

genes involved in N-cycle (Amo-A, Amo-B)

Physicochemi stry Plant biomass

Analyses

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Results

• Only seasonal

changes

• Ash amendment

does not afgect physico-chemical soil properties

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Results

• Bark & Forest

residues ash increase nutrient contents in the soil

• Efgect is more

prominent during spring…

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Results

• Very dry year 2018
• Ash amendment does not

afgect plant growth

• Ash amendment does not

afgect plant composition

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Conclusion

Ash amendment

• has no huge efgect on soil properties
• increases the soil pH
• increases soil nutrient contents
• does not afgect plant growth and composition

 seems to be applicable as soil amendment.

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Future work

• Ongoing fjeld trial for possible long-term efgects
• Analysis of (heavy) metal contents in soil and hay after a

longer application period

• Nutrient analysis of plant biomass
• Soil microbiome analysis

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Thank you

All collaborators All funders All of your attention!

The Residue2Heat project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement No. 654650